Linear Vibration Motor

Abstract

The present invention provides a linear vibration motor, including a base with an accommodating space, and a vibration unit located in the accommodating space. The vibration unit includes a weight, a containing groove, and a number of coil assemblies in the containing groove. The motor further includes a magnet at least partially accommodated in the containing groove and disposed opposite to the coil assembly, and an elastic piece for suspending the vibration unit. The coil assembly includes an iron core and a coil wound around the iron core. The magnet is magnetized along the vibrating direction, the coil assembly is magnetized along a direction perpendicular to the vibration direction, and the magnetic poles of the coil assembly adjacent to the magnet are the same and are disposed opposite to each other. By virtue of the configuration disclosed by the present invention, the vibration performance is improved.

Description

FIELD OF THE PRESENT DISCLOSURE[0001]The present disclosure relates to the field of electrical transducers, more particularly to a linear vibration motor in a mobile device, for converting electrical signals into tactile feedbacks.DESCRIPTION OF RELATED ART[0002]With the development of electronic technology, portable consumer electronic products, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices are more and more popular. These electronic products generally use linear vibration motors to perform system feedback, such as phone call prompt, information prompt, navigation prompt, vibration feedback of game machines, etc. Such a wide range of applications requires that the vibration motor has excellent performance and long service life.[0003]The linear vibration motor of the related technology comprises a base with a containing space, a vibration unit located in the containing space, an elastic piece for fixing the vibration u...

AI Technical Summary

Benefits of technology

The invention is a linear vibration motor that improves vibration performance by using a special design for the magnet and coil assemblies. The magnet and coil assemblies are both oriented perpendicular to the vibration direction, and the magnetic poles of each coil assembly are the same as the magnet. This allows for a stronger interaction between the magnet and coil, resulting in a stronger driving force for the vibration unit. Additionally, the coil is also used to magnetize the iron core, which generates a force of mutual attraction or repulsion with the magnet, further enhancing the vibration effect. Overall, this design improves the vibration performance of the linear vibration motor.

Problems solved by technology

However, in the related linear vibration motor, the driving force of the vibration unit is only generated by a coil, that is, the vibration unit only vibrates in a driving mode by using Lorentz force, and the vibration effect is limited.

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